(1/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 11:01 AM America/New_York.
Valid through 7/21/2026 4:00 PM America/New_York.
fzus51 klwx 211501
cwflwx
expires:202607212000;;352549
coastal waters forecast
national weather service baltimore md/washington dc
1101 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz531-212000-
chesapeake bay from pooles island to sandy point-
1101 am edt tue jul 21 2026
...small craft advisory in effect through wednesday morning...
.rest of today...s winds 15 kt with gusts to 25 kt. waves 3 ft.
isolated showers and tstms late this morning, then showers and
numerous tstms this afternoon.
.tonight...sw winds 15 to 20 kt with gusts to 25 kt. waves 3 ft.
showers and numerous tstms.
.wed...sw winds 10 to 15 kt with gusts to 20 kt. waves 1 to 2 ft. a
chance of showers and tstms.
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt. waves 1 to
2 ft. a chance of showers and tstms.
.thu...n winds 10 to 15 kt. waves 1 to 2 ft.
.thu night...ne winds 5 kt. waves less than 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft.
.sat...e winds 5 kt. waves less than 1 ft. a chance of showers
through the night.
winds and waves higher and visibilities lower in and near tstms.
$$
(2/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 11:01 AM America/New_York.
Valid through 7/21/2026 4:00 PM America/New_York.
fzus51 klwx 211501
cwflwx
expires:202607212000;;352552
coastal waters forecast
national weather service baltimore md/washington dc
1101 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz532-212000-
chesapeake bay from sandy point to north beach-
1101 am edt tue jul 21 2026
...small craft advisory in effect through wednesday morning...
.rest of today...s winds 15 to 20 kt with gusts to 25 kt. waves
3 ft. numerous showers and tstms this afternoon.
.tonight...sw winds 15 to 20 kt with gusts to 25 kt. waves 3 ft.
showers and numerous tstms.
.wed...sw winds 10 to 15 kt. gusts up to 20 kt until late afternoon.
waves 1 to 2 ft. a chance of showers and tstms.
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt. waves 1 to
2 ft. a chance of showers and tstms.
.thu...n winds 10 to 15 kt with gusts to 20 kt. waves 2 ft.
.thu night...ne winds 5 to 10 kt. waves 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft.
.sat...e winds 5 to 10 kt...becoming se after midnight. waves 1 ft.
a chance of showers through the night.
winds and waves higher and visibilities lower in and near tstms.
$$
(3/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 11:01 AM America/New_York.
Valid through 7/21/2026 4:00 PM America/New_York.
fzus51 klwx 211501
cwflwx
expires:202607212000;;352554
coastal waters forecast
national weather service baltimore md/washington dc
1101 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz533-212000-
chesapeake bay from north beach to drum point-
1101 am edt tue jul 21 2026
...small craft advisory in effect through wednesday morning...
.rest of today...sw winds 15 to 20 kt with gusts to 25 kt. waves
3 ft. isolated showers and tstms late this morning, then numerous
showers and tstms this afternoon.
.tonight...sw winds 15 to 20 kt with gusts to 25 kt. waves 3 ft.
showers and numerous tstms.
.wed...sw winds 15 to 20 kt with gusts to 25 kt... diminishing to
5 to 10 kt in the afternoon. waves 2 to 3 ft. showers likely with a
chance of tstms.
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt. waves 1 to
2 ft. showers likely with a chance of tstms.
.thu...n winds 10 to 15 kt with gusts to 20 kt. waves 2 ft.
.thu night...ne winds 5 to 10 kt. waves 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft.
.sat...e winds 5 to 10 kt...becoming s after midnight. waves 1 ft.
winds and waves higher and visibilities lower in and near tstms.
$$
(4/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 11:01 AM America/New_York.
Valid through 7/21/2026 4:00 PM America/New_York.
fzus51 klwx 211501
cwflwx
expires:202607212000;;352557
coastal waters forecast
national weather service baltimore md/washington dc
1101 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz534-212000-
chesapeake bay from drum point to smith point-
1101 am edt tue jul 21 2026
...small craft advisory in effect through wednesday afternoon...
.rest of today...sw winds 15 to 20 kt with gusts to 30 kt. waves
3 ft. scattered showers and tstms late this morning, then numerous
showers and tstms this afternoon.
.tonight...sw winds 20 to 25 kt with gusts to 30 kt. waves 4 ft.
showers and numerous tstms.
.wed...sw winds 20 to 25 kt with gusts to 30 kt... diminishing to
10 to 15 kt with gusts to 20 kt late. waves 3 ft. showers with a
chance of tstms.
.wed night...w winds 10 kt...becoming n after midnight. gusts up to
20 kt. waves 2 to 3 ft. showers with a chance of tstms.
.thu...n winds 10 to 15 kt with gusts to 20 kt. waves 2 to 3 ft.
.thu night...ne winds 5 to 10 kt. waves 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft. a chance of showers after
midnight.
.sat...e winds 5 to 10 kt...becoming sw after midnight. waves 1 ft.
a chance of showers.
winds and waves higher and visibilities lower in and near tstms.
$$
(5/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 11:01 AM America/New_York.
Valid through 7/21/2026 4:00 PM America/New_York.
fzus51 klwx 211501
cwflwx
expires:202607212000;;352545
coastal waters forecast
national weather service baltimore md/washington dc
1101 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz535-212000-
tidal potomac from key bridge to indian head-
1101 am edt tue jul 21 2026
...small craft advisory in effect through late tonight...
.rest of today...sw winds 10 to 15 kt with gusts to 20 kt. waves
1 ft. numerous showers and tstms this afternoon.
.tonight...sw winds 10 to 15 kt. gusts up to 20 kt. waves 1 ft.
numerous showers and tstms.
.wed...w winds 5 to 10 kt. waves 1 ft. showers likely with a chance
of tstms.
.wed night...nw winds 5 to 10 kt. waves 1 ft. a chance of showers
and tstms.
.thu...n winds 5 to 10 kt. waves 1 ft.
.thu night...ne winds around 5 kt. waves 1 ft or less.
.fri...e winds around 5 kt. waves 1 ft.
.sat...se winds around 5 kt. waves 1 ft.
winds and waves higher and visibilities lower in and near tstms.
$$
(6/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 11:01 AM America/New_York.
Valid through 7/21/2026 4:00 PM America/New_York.
fzus51 klwx 211501
cwflwx
expires:202607212000;;352546
coastal waters forecast
national weather service baltimore md/washington dc
1101 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz536-212000-
tidal potomac from indian head to cobb island-
1101 am edt tue jul 21 2026
...small craft advisory in effect through late tonight...
.rest of today...sw winds 10 to 15 kt with gusts to 25 kt. waves
1 to 2 ft. numerous showers and tstms this afternoon.
.tonight...sw winds 10 to 15 kt with gusts to 25 kt. waves 1 to
2 ft. showers and numerous tstms.
.wed...sw winds 10 to 15 kt. gusts up to 20 kt until late afternoon.
waves 1 ft. showers with a chance of tstms.
.wed night...nw winds 5 to 10 kt. waves 1 ft. showers likely with a
chance of tstms.
.thu...n winds 5 to 10 kt. waves 1 ft.
.thu night...ne winds around 5 kt. waves 1 ft.
.fri...e winds around 5 kt. waves 1 ft.
.sat...se winds around 5 kt. waves 1 ft.
winds and waves higher and visibilities lower in and near tstms.
$$
(7/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 11:01 AM America/New_York.
Valid through 7/21/2026 4:00 PM America/New_York.
fzus51 klwx 211501
cwflwx
expires:202607212000;;352547
coastal waters forecast
national weather service baltimore md/washington dc
1101 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz537-212000-
tidal potomac from cobb island to smith point-
1101 am edt tue jul 21 2026
...small craft advisory in effect through wednesday afternoon...
.rest of today...sw winds 15 kt with gusts to 25 kt. waves 2 ft.
scattered showers with isolated tstms late this morning, then
numerous showers and tstms this afternoon.
.tonight...sw winds 15 to 20 kt with gusts to 25 kt. waves 2 ft.
showers and numerous tstms.
.wed...sw winds 15 to 20 kt...diminishing to 10 kt late. gusts up to
25 kt. waves 2 ft. showers with a chance of tstms.
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt. waves 1 to
2 ft. showers with a chance of tstms.
.thu...n winds 10 to 15 kt with gusts to 20 kt. waves 2 ft.
.thu night...ne winds 5 to 10 kt. waves 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft. a chance of showers after
midnight.
.sat...e winds 5 kt. waves less than 1 ft. a chance of showers
through the day.
winds and waves higher and visibilities lower in and near tstms.
$$
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